Ventana software support forum

How many system dynamicists does it take to screw in a lightbulb? What a silly, detail-complexity question! Wouldnt you rather explore the structure that drives the long-term behavior mode of the "indicated bulb screwers" -- s-shaped growth, growth and overshoot, oscillating, or other? Dre...

Dear SD Community: Don Seville and I are involved in a modeling project intended to use both system dynamics and geographic information system (GIS) technologies to help leaders in several U.S. cities plan their development more effectively by enabling them to visualize how different scenarios can p...

Jay Forrest wrote: >Gentlemen! > >I feel obligated to surface an alternative perspective . . . . While Id estimate that we still remain a male-dominated field, Ill bet some of the excellent female SD practitioners and researchers (Dana Meadows, Anjali Sastry, Liz Krahmer Keating, Kris Wile, Beth Saw...

Amy Johnson asked about communities using system dynamics to investigate the drivers of various indicators of quality of life at the community level. Two leads: High Performance Systems and The Healthcare Forum have developed "The Community Builder," a community development/indicators proc...

Dear SD Community: John Swansons question seems to have received reponses regarding the issue of forecasting accuracy, but not on the topic area, urban transportation dynamics. Recently, as part of the Sustainability Institute, Don Seville and I have been investigating the drivers of urban sprawl (f...

Dear SD colleagues: Several weeks ago, I asked to see SD models of forests and forest product economies. Several of you were quite generous with your work (Jim Thompson in particular). Thank you. Along the way, Jim Hines gently chided me for describing a modeling project by the general system it add...

Dear System Dynamicists: Don Seville and I are working with Dana Meadows on the Commodity Systems modeling project of the newly-formed Sustainability Institute. We are seeking system dynamics models that investigate: 1. the dynamics of forests, and/or 2. the interactions between forest ecosystems an...

Dear SD Community -- Ron Kickert asked about linking system dynamics models with GIS mapping systems. Don Seville and I are presently working to display the outputs of a prototype urban-dynamics-based model on a GIS map of the city under study. We are using "Powersim" for the sd model and ...

Dear SD Folks: Anton Chernorubashkin asked about models concerning resource use, ecology, and economics in a "separate region." This note addresses his request. Don Seville and I have recently been working on a modeling project with the Sustainability Institute (Donella Meadows new not-for...

Dear SD folks: I think the article being sought is "Places to Intervene in a System (In Increasing Order of Effectiveness" by Donella Meadows, in Whole Earth Review, Winter 1997. It has a ten-point build-up of general leverage points (numbers, stocks and flows, negative loops, positive loo...